Square auger



' Jne 9, 1936. c. B. SEGOVIA SQUARE AUGER Filed Nov. 15, 1935 Y l 7 zg!- n l /7/4 'l 5 /lllll ilxlwxwlllll om K 1 iz@ .mi I IIMIHI 1 4 JIM/VIV@ iii .V L fg w 2 www ATTORN EYS )VIII/111111,11

WITNESSES o Patented June 9, 1936 A zgfoisnvsf r A '.-sQUAnE AUGER` `Crispin1 B. Segovia, -Yorin-1N.v

iApplication November 15, 1935, Serial No. 50,013

' I s,oioinis.'.lic1.145-122) vThis invention relates to drilling devices, and

particularly toV an improved auger structure adapted to drill or produce'a square hole or square passageway in a piece of wood or other object.

An object of the invention is to provide a simf ple strongconstruction which will noteasily get out of order and which may be rea-dilyap-plied to any surface to drill ahole therein.

Another objeot of the invention is to provide o construction wherein a marin cutting or boring f tool is usedand trimming tools positioned to co- 1- operate therewith so that the device will more easily cutA the material beingdrilled duringfthe' l drilling operation.

An additional object,` more specifically, is to provide a square auger which may be easily manipulated and which may be driven by power carried by the auger or connected therewith by a flexible shaft or other device whereby ample power is always provided for driving the rotating parts.

In the accompanying drawing:

Fig. 1 is a vertical sectional view with certain parts in elevation disclosing an embodiment of the invention as it appears when in use;

Fig. 2 is a sectional view through Fig. 1 approximately on line 2 2; and

Fig. 3 is a transverse sectional view through Fig. 2 approximately on line 3-3.

Referring to the accompanying drawing by numeral, I indicates an object to be drilled. Object I may be a piece of wood, metal or other material and of any desired thickness. The auger structure 2 may be of any desired size and may be used to drill a square hole into object I or entirely through object I. The auger 2 includes a-rectangular casing 3 of sheet metal having enlarged stiifening and bracing corners 4. At the lower end the side walls 5 and 6 are cut away and the side walls 'I and 8 are tapered as indicated at 9. The tapering portion 9 of the respective side walls is provided with openings for receiving the respective bearing sleeves I0 and I I. 'I'hese sleeves may be integral with or rigidly secured to circular saws I2 and I3 as illustrated in Fig. 2. A cutter I4 is keyed to these bearing sleeves sothat the cutter I4 and saws I2 and I3 will all rotate in unison. 'Ihe cutter I4 may be a solid piece of steel having V-shaped teeth I5 or may be formed as an ordinary milling cutter now in common use. It will also be evident that this cutter could be made in other ways but when in use will shave or cut away the material of article I as it is pressed against the article. Also the cutter I 4 must be of some form of toothed structure so as to mesh itin turnrotates the saws I2 and I3." f

From Fig. 2 it will be noted thata screw I 'I screws into the sleeve I I and clamps the sleeveIIl against the same.

with the 'geen wheel ls whereby it isfrototedand Gear I6 has a'bevelgear I8 e oFfFlCE- rigidlykeyed or otherwise secured thereto `so asv shaft 2|. Thershaft 2| is journaled in a spider -to rotate therewith.fBevel'gear I8 is 'rotatablyw l mounted on `the pin I9 and also continuouslyj meshes with apinion 20 which is rigidly securedto f Y 22near pinion 29 and journaled near the oppositex end in a spider 23.

Shaft :2| extends through spider 23 and is shown connected with'a flexible' use.) Ifdesired, the electric motorjcould head1-a1 rectly connected with shaft 2l though ordinarily the flexible shaft 24 is interposed between the motor and shaft 2 I. A pair of handles 25 and 26 are rigidly secured to the casing 8 whereby the device may be properly manipulated and properly held in place during the boring operation. Also a. pair of lugs 21 and 28 are rigidly secured to the casing 8 as shown in Fig. 1. These lugs are provided with apertures 29 and 30 respectively for accommodating the guide shafts 3l and 32, which guide shafts are rigidly secured in any desired manner to a supporting plate 33.

When the device is first applied to an article the plate 33 may be clamped thereto by any form of clamp or if the auger is small the parts may be held thereon by the foot of the operator. The holding of the plate 32 is necessary when starting to drill as the rotation of the cutter would move the device horizontally over the article rather than drill a hole therein. By holding the plate 33 stationary and pressing downwardly on the handles 25 and 26 the cutter I4 and the saws I2 and I3 will cut a square hole directly into the article when the cutter and associated parts are functioning. There will be left a small uncut portion opposite the projections 9 but this quite often is broken away by the shaking and agitation of the parts. However, when the material is tough and the parts are not broken away the auger is forced into the article until the lower ends oi members 9 strike the article. The auger is then withdrawn and turned one-fourth of a revolution and inserted. This action may be carried out until the desired depth of hole is secured or until a passageway has been cut entirely through the article.

As illustrated it will be seen that the train of gears are of sturdy structure so as tov take care of the power necessary to operate the saws and cutter. If desired a greater multiplying of the power may be secured by changing the train of gears, although ordinarily the structure shown is preferable by reason of its simplicity. In action the cutter I4 and the saws l2 and I3 may operate at any desired speed. For instance, it may operate at a few hundred revolutions per minute though a much higher speed has been found desirable as, for instance, from three thousand to four thousand revolutions per minute. During the drilling operation the sawdust is thrown upwardly and either out into the air or into` the interior of casing 8. In case the hole is being drilled to a great depth and a large supply of sawdust has' l accumulated the auger may be removed and the sawdust shaken out. This may bedone as often as necessary though for very small articles it may not be 'necessary until after .the complete hole has been drilled.

I claim: :1..=Anauger for drilling a square hole, said auger comprisinga cylindrical. .one-piece, cutter oigreater4 diameter than length, a saw slightly spacedirom each end of said cutter,each rofsa id Asawszbeingfin the form of a disk and of the same diameter as said cutter, a casinghavingapertured projections, said.H saws having tubular shankscextendingthrough theapertures in said projections into the center of the cutter, means yfiore-,clamping said Shanks together, said shanks being keyed to said cutter whereby the cutter and saws. will rotate as a unit, and power means for dri-vingvsaid cutter.-

L2.y AnV auger for drilling a square hole, said augenincluding a cylindrical shaped cutter lhavingfteeth onthe periphery and abore inthe center extending entirely therethrough, a saw adjacent each end of said cutter connected to the cutter so as to rotate therewith, a gear wheel meshing with the teeth of the cutter, a power mechanism connected with said gear wheel for driving the same, and a casing for said gear wheel and associated parts, said casing having projections carrying said cutter and said saws with the projections positioned between the saws and the cutter leaving a narrow uncut portion of the work l0 g cutter having teeth on the periphery and a centrally `positioned bore, a disk shaped saw ar ranged adjacent each end of the cutter, said saw being of the same diameter. asthe'cutterA and arranged parallel to the ends of the cutter, each of said sawsv having a tubular sleeve projecting therefrom into the aperture in said cutter, one of said sleeves being .internally threaded. and, the other-.sleeye being vprovided with a shoulder, a screw Yhaving a threaded part acting on the threads of the internally threaded sleeve and the headacting against said shoulder for clamping saidfsleeves togethenfand means for connecting powerwto said cutter for driving the same, said sleeves being, connected with said cutter whereby saidfsaws will'bedriven simultaneouslyl with the cutter.

i g CRISPIN B. SEGOVIA. i@ 

